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  • On Bjorn Lomborg and deforestation

    In The Skeptical Environmentalist, Bjorn Lomborg writes that "basically, the world's forests are not under threat." A charitable reader could attribute this flawed conclusion to errors of omission and ignorance; perhaps the author simply doesn't know the sources well enough to interpret them properly. Less charitably, one might reasonably conclude that Lomborg intentionally selects his data and citations to distort or even reverse the truth. His interpretations of data on global forest cover and Indonesian forest fires aptly illustrate both failings.

  • On Bjorn Lomborg and population

    Some years ago, well before many outside Denmark knew Bjorn Lomborg's name, a group of his fellow faculty members at the University of Aarhus took the unusual step of developing a website specifically to warn the scientific community and others about flaws in his work. Appalled by Lomborg's scientific pretensions and unfounded conclusions, these faculty members, including a former head of the Danish Academy of Sciences, actively disassociated themselves from him.

  • On Bjorn Lomborg and species diversity

    Bjorn Lomborg opens his chapter on biodiversity by citing my 1979 estimate of 40,000 species lost per year. He gets a lot of mileage out of that estimate throughout the chapter, although he does not cite any of my subsequent writings except for a single mention of a 1983 paper and a 1999 paper, neither of which deals much with extinction rates. Why doesn't he refer to the 80-plus papers I have published on biodiversity and mass extinction during the 20-year interim?

  • On Bjorn Lomborg and climate change

    Bjorn Lomborg's chapter on global climate change is a clever polemic; it seems like a sober and well-researched presentation of balanced information, whereas in fact it makes use of selective inattention to inconvenient literature and overemphasis of work that supports his lopsided views. The Intergovernmental Panel on Climate Change reports and other honest assessments don't have the luxury of using such tactics, given the hundreds of external reviewers and dozens of review editors.

  • On Bjorn Lomborg and extinction

    My greatest regret about the Lomborg scam is the extraordinary amount of scientific talent that has to be expended to combat it in the media. We will always have contrarians like Lomborg whose sallies are characterized by willful ignorance, selective quotations, disregard for communication with genuine experts, and destructive campaigning to attract the attention of […]

  • A skeptical look at The Skeptical Environmentalist

    Before the terrible events of Sept. 11 nudged our national mood towards nouveau-earnestness, skepticism was the disposition of the day. Bred in the swamps of transparent consumer manipulation, untrustworthy political leaders, and information overload, skepticism stamped a permanent question mark onto the brows of Generation X and seemed poised to become the watchword of our nation.